Improvement in paper-bag machines



4s eeeeeeeee et 1 E. B. STOGKING.

Paper-Bag Mac ine. N'o. 222,544. Paten e Dec. 9, 1879.

4 Sheets-Sheet; 2.v

B. B. STOGKING. Paper-Bag Machine. No. 222,544. F- atented Dec. 9,1879.

4 Sheets-Sheet 8.

B. B-. gTocKING. Paper-Bag.1 Machine. No. 222,544. Patented Dec. 9, 1879.

, N/FEYERS. PHOTO-LITHOGRAPNEH, WASHINGTON, D 0,

- 4 Sheets-Sheet 4. E. B. STOCVKING. Paper-Bag Machine. NO. 222,544.

i Invan l'or m Patented Dec. 9,1879.

Il- PETERS. PHOYO-UYHOORAPMER. WASHINGTON. D. O.

naman STATES: Paninira' @naren EDGAR B. STOOKING, OF WASHINGTON, DISTRICT OE COLUMBIA, ASSIGNOR TO WILLIAM O. CROSS, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN PAPERHBAG MACHlNES.

Spcci'fication forming part of Letters Patent No. 222,544, dated December 9, 1879; application filed November 20, 1879.

To all 'whom it may concern Be it known that I, EDGAR B. STocKrNG, a legal resident of Syracuse, in the State of New York, now residing in Washington, District of Columbia, have invented certain new and usefull Improvements in Machinery for Making Paper Bags, of which the following is a specification.

`My invention has reference to machinery for making satchel-bottom 'paper bags; and it relates particularly to mechanism for making the second and the final folds of the satchelbottom after the first or diamond fold has been formed. i r

It is my object to make the second and third folds' (which complete the formation of the satchel-bottom) while the blank is in continuous motion, and by the use of rotating devices. The diamond fold, as is well known, has two points o r tlaps, which are successively folded over in order to make the second and third folds. I bring each point or portion which is to be folded successively to the front relatively to the direction of the feed. The portion which is to be first folded is first in front.

`When it is folded, or in the gripe of the device which folds it, it is carried to one side, or

out of the line of feed-that is to say, the line in which the blank travelsthrough the machine-and the other and. unfolded fiap or portion is brought to the front, thus reversing the position of the parts, the part that was first in front being now in rear. The unfolded portion now in front is acted on by folding dey vices which fold it into the third or final fold.

All this takes place while the blank is in continuous motion.

'1 It has heretofore been essayed, in envelope i and bag machines, to deflect or direct the g receives, holds, and carries the folded portion or point of the diamondv fold, and operates to present the unfolded point to the front in the line of feed. It is in this instrumentality that my invention principally resides.

The blank is held by and moves with the rotary carrier until the unfolded point or portion has advanced far enough to be taken by devices in advance of the carrier relatively to the feed. The moment these devices take the blank the carrier releases its hold, and the blank moves uninterruptedly on to have the final fold formed, and to be discharged as a completed bag from the machine.

The nature of my invention and the manner in which the same is or may be carried into effect can, however, best be explained and understood by reference to theaccompanying drawings, in which- Figure l is a longitudinal vertical central section of a machine embodyin g my improvements in their preferred form. Fig. 2 is afront elevation of the same. Figs. 3, 4, and 5 are perspective views of detached parts, which will be heroinafter referred to. Figs. (i, 7, 8, and 9 are diagrams representing the various positions which are assumed by the blank, and the devices Which operate upon it during the making of the second and final folds.

I will describe first the construction of the machine, and then its mode of operation.

A suitable frame-work, as shown, supports the various operating parts of the machine. A B are feeding and pasting rolls or cylinders, the former being cut away at points a,, opposite to the ridges or paste-applying sections b on the cylinder B, which receives paste from the roll Bf, arranged in the paste-trough B2.

A bridge, O, may be emploped to direct the blank in its passage from the feed and paste cylinders to the folding-cylinders. This bridge is provided with side guides, c, and is formed with cut-away portions or grooves wherever the pasted-under portions of a blank would come in contact with it if it were not so cut away; or in lieu of the bridge I may use rods O', one of which is indicated by dotted lines in Fig. l, extending from in front of the rolls A B to roll D, and properly positioned to direct the blank and prevent it from being carried around with the paste-cylinder B.

In advance of the rolls A B are two pairs of cylinders or rolls, D E and F G. The cylinder E, with its appliances, constitutes the device which I have hereinbefore termed a rotary poiut-reversin g carrier. lt also acts, in conjunction with its fellow cylinder-I), to form the first of the two folds which it is my object to make, the second or last fold being formed by the cylinders F G. One cylinder of each pairin this instance the cylinder D of tle first pair and the cylinder F of the second pair-is provided with a radialIy-moving folding-blade, d, which, at proper times, is caused to project from within the cylinder body by a cam or cams, e, which intermittently influence the blade through the medium of studs or pins f, which project laterally from the frame which carries the blade and wipe against the cams. These parts are shown detached in Fig. 4, which, at the left, represents a portion of the cylinder turned so as to exhibit that cylinder-head which is concealed from view in the main portion of the figure. When the blade is free from the cams it is caused to return within the roll by springs g. Either or both of the folding-blades d may be thus arranged. Only onethe blade of the cylinder F-is so represented in the drawings, the blade d on the other cylinder, D, being shown as stationary and fast in the cylinder. Either arrangement will answer, although the movable. blade is preferable on some accounts.

The roll or cylinder E is provided with a jaw, h, arranged in it and intended to cooperate with the blade d on cylinder D to fold the front point of the diamond. The jaw moves on a pivot, and is operated intermittently and atproper'timcs to close against the pareh' of the cylinder, which serves as a stationary jaw, by means of cams i, Fig. 3, which influence thejaw tlrough the medium of crank-armsj, attached to the blade or the journals thereof and projecting laterall y from the heads or ends of the cylinder. There is a crank-arm and cam at each head or end of the cylinder. I have, however, deemed it necessary to show but oneI set in the figure.

The upper ends of the cams i' are preferably made adjustable, so as to cause thejaw to bite for such length of time as is desirable. For this purpose, to the ends may be attached a slottcd extension held by set-screws Ir, Fig. 1, to the machine-frame. The object of the adjustment is to adapt the jaw and cylinder -which, as before said, constitute the rotary point-reversing carrie 1 to fold bag-bottoms of different sizes.

In case a series of connected blanks, such as are sometimes formed in making paper bags, are fed to my machine, I provide the cyliuders D E with a knife, l, and slot l', as shown in Fig. 1, said devices operating at each revolution of the cylinders to sever or complete the separation of one blank from the connected series.

Roll G is provided with a jaw, h?, arranged and operated in manner similar to the iaw h of cylinder E. The roll or cylinder G is shown detached in Fig. 5, with one of its heads provided with a crank,j', and cam i'. It is not, however, necessary that this cam should be adjustable.

Springs tz throw back the jaws of the two cyliuders E and G when said jaws are released from the influence of these cams.

The cylinder F is Provided in advance of its folding-blade d, relatively to the feed, with a nipper or nippers, m, which work in a suitable recess or recesses in the cylinder, and are fast to a rock-shaft, m', mounted in said cylinder, as shown clearly in Fig. 4. The shaft at one end is provided with a fork, mz, one branch of which is operated by a tappet, n, to move the nippers to the position shown in the figure, which inay be terned their open position. The other branch of the fork is operated by another tappet, n', to move the nippers in the contrary direction in order to bring them to what may be termed their closed position, or the position in which they take hold ofthe bag-blank. Both tappets are secured to the frame of the machine. The lower tappet, nl, which operates to close the nippers, is provided with a slotted extension, as shown in Fig. 4, through which passes the set-screw which holds it to the frame, the object being to render this tappet adjustable with a view to regulate the time at which the nippers shall close on the blank.

On the opposite end Aof the shaft m' is a crank-arm, o, on which is loosely mounted a rockin g arm, p, to each of whose ends is fast-` i ened a. spring, p', which converge and are attached to the cylinderhead at their point ot' meeting 192. The fork and tappets serve to tilt the crank-arm far enough to carry it to one side or the other of the dead-center, and the springs p' complete the remainder of the movement ot' the nippers in either direction.

The nippers can be made as long as desired. lnstead of being arranged, as shown, to vibrate in the line vof rotation of the cylinder, they may be arranged to vibrate laterally and to close over the side instead of the front of the point ofthe blank. They will serve, without further adjuncts, to take the blank; but in order to insure as far as possible entire precision and accuracy, I employ a device, J, wlich 1 term a safety-lover, which is intended at the proper time to rise so as to carry up against the cylinder the flap of the diamond fold which is to be seized by the nippers. This safety-lever is an angle lever, pivotcd at J' to the machiueframe and attached to a spring, J2, which tends to hold its acting end down or away from the cylinder F. The upper end of this lever is acted on by an oscillatory or vibratory arm, r, hung on a pivot oii the upper part of the machine-frame, the pivot in this instance being the journal of the roll I, which is arranged to bear with yielding pressure on roll G, and to serve, in connection t between the rolls.

blade and jaw draw apart.

wit-h .the latter roll, to deliver or diseliargc tlie completed bag from the machine. The arn r is operated by a pin or stud, s, on roll G. Said stud wipes agaiiist the arin until it reaches and passes through a slot, r', formed therein.

Tlie parts just described are sliown clearly iii `Figs. 1, 2, and 5 of the drawings.

f A sm all pressure-roll, H, is placed above tlie rotating point-reversing carrier-cylinder E. This iroll is not a necessity, aiid may be dispensed with.

` All the actiiig` rolls have tlie same peripheral speed, and are suitably geared together and driven. The direction in whicli they nove is indicated by arrows. 4

The method of operation of the machine is Eis-follows: A tubular blank, w, opened to the diamond fold, is presented with 'the diamond fold beneath to the feed-rolls'A B, its forward point lying at the longitudina-lcenter of and Iii this position it remains unafi'ected until thepastin-g-idges b come in contact-.with it. It is byd these ridgessnitably pasted on its .diamond fold, the pastelines having in this instance U shape, and simultaneously fed by said ridges and tlie upper roll, A, until the wider portion of the front point of the diamond fold is in the bite of the rolls, which then continue the feed thus started and carry forward the blank tothe cylinders D E. The feed-rollsand the pair of i cylinders D E are so timed, relatively, that the former feed the front point of the diamond between the latter in advance of the contactline of the folding-blade d and jaw h, and to such a distance in advance of these devices that when they coine together they will fold the front point in the proper place. The positioii of the parts wheii this takes place is shown in diagram Fig. 6, l being the front point and 2 the rear point of the diamond fold.

i The rotary point-reversing carrier E and the cylinder D coiitiiiuing their revolution, the y p The jaw closes tiglitly on the fold, and thus, holding the blank, carries it around as far as iiidicated iii diagram Fig. 7. The loose rear fiap or point, 2, of the diamond is naturally thrown out so as to :project from that part of the blank which is wrapped or drawn around and in contact with the cylinder, and comes 'up against the under side of the rot-ary ni pper-cylinder F. It is thus brought to the front and present-ed in the line of feed. Thus, by causing the foldingjaw h to hold the front point, as described and shown, I aiii enabled to reverse the points, carryin g the front folded point, 1, to the rear, and

o bringing the rear point, 2, to the front and in the line of feed.

The point 2 is assisted rinto proper position i to be taken by the nippers by'the safety-lever,

which knocks the point vup against the cylinder F, and holds it there uitilthe iiippers have closed, thus insuring that the pointshall be in a place wherev the deseending nippers will grasp it. The position of the parts at this time is clearly ill ustrated in Fig. 7. The blank, iiow in the grasp and under the control of the nippers, moves with the nippers until it is in the bite of the cylinder-s F G. The nippers open, and the folding-blade and jaw of these cylinders act together to fold the front 2, as indicated iii diagram Fig. 8. The folding having thus been coinpleted, the bag passes out between the final rolls G I, as indicated in diagram Fig. 9, and is discharged from the inachine.

It will be noted that the blank is at all times in the grasp of and under the control of the cyliiiders or rolls from its entrance into to its discharge from the machine. It will also be noted that the reversal of the points takes place without intcrfering with or clieckin g the continuous forward feed of the blank.

I find it desirablc to use some device which will hold down the second fold and keep it in place until it is properly overlapped by the final fold. If some such device be notI einployed the said second fold at times is liable to rise as the blank passes upfroin the roll F and bends over the roll G. To this end I eaii iiake use of a safety device, such as shown in diagram in Fig. 12, consisting of an elastic spring-presser, J, seated in a recess in the periphery of the cylinder F, in' a position where it will come opposite to and bear outwardly upon the second fold, 1, which lies next to roll F, in the position indicated in Fig. 8, hereinbefore referred to. The spring-presser is sufficicntly light and elastic to permit it to be coin pressed into its recess as it passes the cyliider G, and itl maintains its pressure upon the second fold until the latter has traveled far enough to conie under an elastic shoe, K, which holds the fold down until it is properly overlapped by the final fold.

I remark that the pastin g and feed rolls are not indepensable to the operation of the niachine; iior, indeed, is the roll D. I can, for instance, iii lieu of the latter, employ1 a vibratory or reciprocatory blade to co-operate with the jaw of the rotary point-reversing carrier E, and may bring the blank, by any suitable means, to a position where its point caii, by the recil'irocatin g blade, be tucked into the carrier-jaw.v The carrier then takes care of the blank and delivers it to'the subsequeiitinechanisiii, as hereiiibefore described. I inay also use, in conjunetion with the fiiial rolls G I, a vibratory tuckiiig-blade, S, Fig. 11, which will smooth down the point of the second fold and assure its being laid in such position as to be properly overlapped by the final fold.

The blade can get its motion in various ways--a-s, for instance, by providing its rocking hub S', on axis of I, with an arm, 82, having a roller-stud working iii a cam or eccentrio groove, 83, oii one of the heads of cylinder G, as showii. i

The same actuatin g mechanism may be used with a Vibratory presser bar or finger, T, (shown iii the same figure,) which can be eniployed as a substitute for roller II. The arm T', attached to this vibratory presser, has a roller-stud which works in a cam or eccentric groove in one of tle heads of cylinder E, as shown.

I can also dispense entirely with tle three rolls F G I, using in lieu thereof the arrangement indicated in Fig. 10, consisting of a frame, V, swinging np and down on axis V', and carrying in its end adjoining tle roll E delivery-rolls V2 V?, driven by suitable gearing. Over the two rolls is a vibratory foldingblade, V3, which acts to tuck between them the final fold. The blank being on the pointreversing carrier E, with rear point of diamond to the front, the vibratory frame V rises and brings the rolls V2 in proper position under the projecting flap 2, as indicated. The folding-blade descends and tucks the flap between rolls V2. simultaneously the jaw h of the point-reversing carrier releases its hold on the blank, and the frame V swings downward, deliverin g or dischargin g the ba g, as indicated by dotted lines.

To adjust the machine for folding differentsized bags, the blank is fed in to a greater or less distance before being regulated by properly tining the feed-rolls with relation to the fblding-cylinders. The jaw of the point-reversing carrier is released sooner or later from its adjustable cam, and the ippers are closed sooner or later by means of their adjustable tappet, each adjnstnent being in accordance with the size ofthe bag and the distance apart of the second and third folds of the botton thereof.

Having described ny invention, what I claim, and desire to secure by Letters Patent, is as follows:

1. In machinery for making satchel-bottom paper bags, a rotary point-reversing carrier, snbstantially as and for the purposes hereinbefore set forth.

2. In paper-bag machines, a rotary pointreversing carrier consisting of a rotary roll or cylinder provided with a jaw orjaws, which operate, substantially as described, to carry the folded front point of the diamond fold of a satchel-bottom bag and to reverse its position, so as to bring the rear point of the dianond to the front relatively to the feed.

3. The combination, with the rotary pointreversi g carrier, of rotating rolls or cylinders armed with nippers and folding devices, or the equivalent of the same, by which the blankxis taken from the carrier and the last fold formed thcrein, the combination having the mode of operation substantially as hereinbefore set forth.

4. In combination with the nipper-cylinder, the safety-lever intermittently operated, substantially as described, to bring the point of the blank into position to be grasped by the nippers.

5. The combination, substantially as hereinbefore set forth, of the rotary point-reversing carrier, its fellow cylinder or roll provided with a folding-blade, the nipper-cylinder and its fellow roll or cylinder provided with nipping or grasping and folding devices, and actnating mechanism for said members, the combination having the mode of operation substantially as specified.

6. The feed-rolls provided with paste-ridges and corresponding cut-away portions, as described, in combination with rotary folding mechanisms, as cylinders D E and devices carried by the same, substantially as hereinbefore set forth.

7. The combination of the feeding and pasting mechanism, the rotatin g cylinders D Eaid F G, folding and grasping or nipping devices carried b v said cylinders, and mechanism for operating said devices, the combination having the mode of operation substantially as set forth.

8. In machinery for making satchel-botton paper bags, the combination of the following elements: a rotary point-reversing carrier, a grasping or nipping mechanism in advance of said carrier, which takes hold of the blank by the unfolded pointof the diamond fold broughtto the front by the carrier, and folding devices which fold the said point alter it bas been released by the nipping or grasping mechanism, the combination being and acting substantially as hereinbefore set forth.

ln testimony whereof I have hereunto set my hand this 20th day of November, 1879.

EDGAR B. STOCKING.

Witnesses A. Dum, M. GEORGII. 

